Abstract: An LCD device adapted to improve its picture quality in spite of the brightness variation includes: a gray scale modulator modulating R, G, and B data; a backlight dimming controller generating a back dimming signal that is inversely proportional to the modulated R, G, and B data generated in the gray scale modulator; and an over driving controller selectively overshoot-compensating the R, G, and B data from the gray scale modulator in every gray scale level through the comparison of the R, G, and B data of current frame and the R, G, and B data of previous frame, wherein, the modulated R, G, and B data each include maximum gray scale levels lower than those of the overshoot compensated R, G, and B data.

Abstract: Provided is a liquid crystal display device that can improve the image quality of a moving image. The liquid crystal display device includes a driver, a backlight unit, a first lamp driver, a second lamp driver, and a lamp driving controller. The liquid crystal panel divided is into at least three regions, and has a plurality of lamps arranged to correspond to each of the divided regions. Lamps of the lamps arranged in upper and lower regions of the liquid crystal panel are connected to each other. The first lamp driver controls on/off times of the lamps in the upper and lower regions of the liquid crystal panel. The second lamp driver controls on/off times of the lamps in the region excluding the upper and lower regions of the liquid crystal panel. The lamp driving controller controls the first and second lamp drivers using signals supplied from the driver.

Abstract: A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel, an optical sheet provided on a rear surface of the liquid crystal panel, an interface disposed on a rear surface of the liquid crystal panel, a power receiver disposed on the rear surface of the liquid crystal panel, a memory card and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light, an inverter for supplying alternating current to the lamp, a connector for receiving third image data from external equipment, and an interface converter for applying the third image data to the interface of the liquid crystal module.

Abstract: Provided are a liquid crystal display device capable of improving motion image quality and a method for driving the same. The liquid crystal display device according to an embodiment of the present invention includes an input unit, an overdriving compensation unit, a selection unit, and a data selection control unit. The input unit supplies pixel data to a pixel of a liquid crystal panel. The overdriving compensation unit outputs overdriving compensation pixel data using the pixel data input from the input unit. The selection unit selects one of the pixel data input from the input unit and the overdriving compensation data input from the overdriving compensation unit. The data selection control unit detects whether the pixel data input from the input unit is motion image data to control the selection unit.

Abstract: A digital-to-analog converter includes a first decoder, a second decoder and a voltage summing buffer. The first decoder receives upper bits of a digital signal and upper reference voltages to output an upper voltage corresponding to the upper bits. The second decoder configured to receive lower bits of the digital signal and lower reference voltages to output a lower differential voltage corresponding to the lower bits. The voltage summing buffer generates an output voltage based on the upper voltage and the lower differential voltage, such that the output voltage corresponds to the digital signal including the upper bits and the lower bits.

Abstract: At least one example embodiment discloses a sensor circuit capable of processing a second input signal received via a sensing line by using a demodulation path for performing a demodulation operation or processing the second input signal by using a non-demodulation path that does not perform the demodulation operation, according to a level of a first input signal, for example, a noise signal, received via the sensing line.

Abstract: An operating method of a touch controller includes receiving a plurality of currents through a plurality of channels, respectively, sensing a first current among the plurality of currents and extracting the sensed first current as a first control current and converting a charge corresponding to a difference between the first control current and a second current among the plurality of currents into an output voltage.

Abstract: An apparatus and a method of driving a liquid crystal display device include receiving gamma-treated data, performing a reverse gamma correction of the data, the reverse-gamma-corrected data having a first linear characteristic, performing a signal processing of the reverse-gamma-corrected data having the first linear characteristic, performing a gamma correction of the processed data, and generating data signals based on the gamma-corrected data using analog voltage values, the data signals having a second linear characteristic.

Abstract: A liquid crystal display device includes a liquid crystal panel, a timing controller, a compensation unit and a panel drive circuit. The liquid crystal panel has a plurality of color pixels, each of the color pixels including two sub-pixels which represent two different colors. The timing controller generates a sub-pixel data stream of two sub-frame format. The sub-pixel data stream of two sub-frame format includes a first sub-pixel data for a first sub-frame and a second sub-pixel data for a second sub-frame. The first sub-pixel data and the second sub-pixel data have different gamma characteristics. The compensation unit is operable to compensate the first sub-pixel data and the second sub-pixel data with different rates. The panel drive circuit drives the sub-pixels on the liquid crystal panel and supplies the sub-pixels with the compensated first sub-pixel data for the first sub-frame and the compensated second sub-pixel data for the second sub-frame.

Abstract: A method of driving a liquid crystal display device includes extracting brightness components of a portion of the first data for a current frame, arranging the brightness components for the current frame into a brightness histogram, retrieving brightness histograms for at least two frames prior to the current frame to generate an average histogram, generating second data for the current frame based on the average histogram, comparing the histogram for the current frame with the average histogram to determine whether an image at the current frame is a moving image or a still image, and driving the liquid crystal display device in accordance with one of the first data and the second data based on the comparison result.

Abstract: Provided is an LCD device. The LCD device includes: an input unit, a backlight unit, a histogram analyzing unit, a data correcting unit, a liquid crystal panel driving unit, a duty ratio determining unit, and a lamp driving unit. The input unit inputs data corresponding to an image displayed on a liquid crystal panel, and the backlight unit includes a plurality of lamps. The histogram analyzing unit analyzes a histogram of data input from the input unit to generate a select signal according to a brightness state of the data. The data correcting unit corrects pixel data to be supplied to the liquid crystal panel using at least one of a plurality of gamma compensating characteristic curves. The liquid crystal panel driving unit drives the liquid crystal panel. The duty ratio determining unit generates a plurality of lamp-on signals. The lamp driving unit generates a lamp driving voltage corresponding to the lamp-on signal.

Abstract: A liquid crystal display device includes a liquid crystal panel, a timing controller, a compensation unit and a panel drive circuit. The liquid crystal panel has a plurality of color pixels, each of the color pixels including two sub-pixels which represent two different colors. The timing controller generates a sub-pixel data stream of two sub-frame format. The sub-pixel data stream of two sub-frame format includes a first sub-pixel data for a first sub-frame and a second sub-pixel data for a second sub-frame. The first sub-pixel data and the second sub-pixel data have different gamma characteristics. The compensation unit is operable to compensate the first sub-pixel data and the second sub-pixel data with different rates. The panel drive circuit drives the sub-pixels on the liquid crystal panel and supplies the sub-pixels with the compensated first sub-pixel data for the first sub-frame and the compensated second sub-pixel data for the second sub-frame.

Abstract: An over-driving look-up table automatic setting apparatus for a liquid crystal display device includes: an input device that specifies a critical response condition for a liquid crystal display device; a sensor that detects an amount of light from the liquid crystal display device and that generates a signal corresponding to the amount of light; a response state detecting unit that measures the response state from the signal generated by the sensor; a controller that receives the response state for gray scale differences from each of a plurality of gray scale values to determine transient pixel data producing a response state that satisfies the critical response condition and that sets an over-driving look-up table by mapping the transient pixel data to corresponding gray scale difference values for each gray scale value; and a memory that stores the over-driving look-up table.

Abstract: A backlight unit enables an LCD to realize five primary colors using a four sub-pixel structure. The backlight unit includes at least one fluorescent lamp of white color, at least one light source of yellow color, and at least one light source of cyan color. Alternatively, the backlight unit includes at least one first fluorescent lamp of white color having R, G, and B wavelengths, and second or/and third fluorescent lamps provided in between the adjacent first fluorescent lamps. The second fluorescent lamp is coated with yellow pigment, and the third fluorescent lamp is coated with cyan pigment.

Abstract: A method of driving a liquid crystal display device includes extracting brightness components of a portion of the first data for a current frame, arranging the brightness components for the current frame into a brightness histogram, retrieving brightness histograms for at least two frames prior to the current frame to generate an average histogram, generating second data for the current frame based on the average histogram, comparing the histogram for the current frame with the average histogram to determine whether an image at the current frame is a moving image or a still image, and driving the liquid crystal display device in accordance with one of the first data and the second data based on the comparison result.

Abstract: A method of driving a liquid crystal display device includes extracting brightness components of a portion of the first data for a current frame, arranging the brightness components for the current frame into a brightness histogram, retrieving brightness histograms for at least two frames prior to the current frame to generate an average histogram, generating second data for the current frame based on the average histogram, comparing the histogram for the current frame with the average histogram to determine whether an image at the current frame is a moving image or a still image, and driving the liquid crystal display device in accordance with one of the first data and the second data based on the comparison result.

Abstract: A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel, an optical sheet provided on a rear surface of the liquid crystal panel, an interface disposed on a rear surface of the liquid crystal panel, a power receiver disposed on the rear surface of the liquid crystal panel, a memory card and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light, an inverter for supplying alternating current to the lamp, a connector for receiving third image data from external equipment, and an interface converter for applying the third image data to the interface of the liquid crystal module.

Abstract: A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel, an optical sheet provided on a rear surface of the liquid crystal panel, an interface disposed on a rear surface of the liquid crystal panel, a power receiver disposed on the rear surface of the liquid crystal panel, a memory card and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light, an inverter for supplying alternating current to the lamp, a connector for receiving third image data from external equipment, and an interface converter for applying the third image data to the interface of the liquid crystal module.

Abstract: Disclosed is a display driving apparatus. The display driving apparatus comprises: a current DAC generating a data current; a data line connected to a pixel circuit requiring data writing on a matrix array of a display panel; an adjacent data line located adjacent to the data line; a current mirror feedbacking an excessive charging current generating due to parasitic capacitance of the adjacent data line as a charging current for charging parasitic capacitance of the data line; a current output unit connected to the current mirror and including a first driving transistor unit for driving the data line, and a second driving transistor unit for driving the adjacent data line; a source follower driving the current output unit according to an output node voltage of the current DAC; and a first constant current source discharging parasitic capacitance excessively charged in the data line and the adjacent data line.

Abstract: A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel; an optical sheet provided on a rear surface of the liquid crystal panel; an interface disposed on a rear surface of the liquid crystal panel; a power receiver disposed on the rear surface of the liquid crystal panel; a memory card; and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light; an inverter for supplying alternating current to the lamp; a connector for receiving third image data from external equipment; and an interface converter for applying the third image data to the interface of the liquid crystal module.